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1.1 ! root 1: /* Console Processor Interface */ ! 2: /* Tahoe version, Nov. 1982 */ ! 3: ! 4: /****************************************/ ! 5: /* */ ! 6: /* Reduced DCB layout for byte */ ! 7: /* communication. */ ! 8: /* */ ! 9: /****************************************/ ! 10: ! 11: asm(".set CPMDCB,21"); ! 12: asm(".set DC_OFF,2"); ! 13: asm(".set DC_ON,1"); ! 14: asm(".set MME,9"); ! 15: asm(".set DCR,27"); ! 16: asm(".set PDCS,28"); ! 17: asm(".set CTL_SW,0x41b"); /* Addr of switches to turn on Cache, MME, Fault */ ! 18: long tmp_lw; ! 19: ! 20: ! 21: #define CPBUFLEN 200 /* Output buffer length */ ! 22: struct cphdr ! 23: { ! 24: char cp_unit; /* Done bit & unit # */ ! 25: char cp_comm; /* Command */ ! 26: short cp_count; /* Counter (when relevant) */ ! 27: }; ! 28: ! 29: struct cpdcb_o /* Output structure */ ! 30: { ! 31: struct cphdr cp_hdr; ! 32: char cp_buf[CPBUFLEN]; /* Buffer for output or 'stty' */ ! 33: }; ! 34: ! 35: struct cpdcb_i /* Structure for input */ ! 36: { ! 37: struct cphdr cp_hdr; ! 38: char cpi_buf[4]; /* Buffer for input */ ! 39: }; ! 40: ! 41: #define CPDONE 0x80 /* 'Done' bit in cp_unit */ ! 42: #define CPTAKE 0x40 /* CP 'ack' to this cpdcb */ ! 43: ! 44: /* Values for 'unit' */ ! 45: #define CPUNIT 0 /* The CP itself */ ! 46: #define CPCONS 1 /* Console line */ ! 47: #define CPREMOT 2 /* Remote line */ ! 48: ! 49: /* Values for 'command' */ ! 50: #define CPRESET 0 ! 51: #define CPWRITE 1 ! 52: #define CPREAD 2 ! 53: #define CPSTTY 3 ! 54: #define CPBOOT 4 ! 55: ! 56: ! 57: /* Put a char to CPU2 console */ ! 58: ! 59: #define NCHAR 1 ! 60: ! 61: long cpbuf_sz = 1; /* Buffer size */ ! 62: long charcnt = 0; ! 63: struct cpdcb_o cpout; /* DCB for output */ ! 64: struct cpdcb_i cpin; /* DCB for input */ ! 65: ! 66: asm(".set HISR,0x410"); ! 67: ! 68: putstr(str) ! 69: char *str; ! 70: { long c_cnt; ! 71: ! 72: cpout.cp_hdr.cp_unit = CPCONS; /* Reset done bit */ ! 73: cpout.cp_hdr.cp_comm = CPWRITE; /* Set command */ ! 74: for(c_cnt=0;;c_cnt++) { ! 75: cpout.cp_buf[c_cnt] = *str++; ! 76: if (cpout.cp_buf[c_cnt]=='\n') { ! 77: c_cnt++; ! 78: cpout.cp_buf[c_cnt]='\r'; ! 79: } ! 80: if (cpout.cp_buf[c_cnt]=='\0') break; ! 81: } ! 82: if (c_cnt) { ! 83: cpout.cp_hdr.cp_count = c_cnt; ! 84: cp_poll('\0'); } ! 85: } ! 86: ! 87: putchar(c) ! 88: { ! 89: cpout.cp_hdr.cp_unit = CPCONS; /* Reset done bit */ ! 90: cpout.cp_hdr.cp_comm = CPWRITE; /* Set command */ ! 91: cpout.cp_buf[charcnt] = c; ! 92: cpout.cp_hdr.cp_count = 1; ! 93: cp_poll(c); ! 94: } ! 95: ! 96: ! 97: char rdchar() ! 98: { ! 99: register long r12; ! 100: cpin.cp_hdr.cp_unit = CPCONS; /* Reset done bit */ ! 101: cpin.cp_hdr.cp_comm = CPREAD; /* Set command */ ! 102: cpin.cp_hdr.cp_count = 1; ! 103: cp_pollr(); ! 104: r12 = (long)(&cpin.cpi_buf[0]); ! 105: asm("mtpr r12,$0x1c"); /* mtpr r11,$PDCS */ ! 106: return(cpin.cpi_buf[0] & 0x7f); ! 107: } ! 108: ! 109: ! 110: /* Poll CP on read ! 111: */ ! 112: cp_pollr() ! 113: { register long r12, r11, time; ! 114: ! 115: time = 0x1ff0000; ! 116: r12 = ((long)&cpin) & 0xffffff; ! 117: asm("mtpr r12,$CPMDCB"); ! 118: ! 119: r11 = (long)(&cpin.cp_hdr.cp_unit); ! 120: while (time-- && !(cpin.cp_hdr.cp_unit & CPDONE)) { ! 121: asm("mtpr r11,$0x1c"); /* mtpr r11,$PDCS */ ! 122: } ! 123: if (!(cpin.cp_hdr.cp_unit & CPDONE)) cp_hlt(); /* Time out */ ! 124: } ! 125: ! 126: ! 127: /* Poll CP on write ! 128: */ ! 129: cp_poll(c) ! 130: char c; ! 131: { register long r12, r11, time; ! 132: ! 133: time = 0x1ff0000; ! 134: r12 = ((long)&cpout) & 0xffffff; ! 135: asm("mtpr r12,$CPMDCB"); ! 136: asm("mtpr r12,$CPMDCB"); ! 137: ! 138: r11 = (long)(&cpout.cp_hdr.cp_unit); ! 139: while (time-- && !(cpout.cp_hdr.cp_unit & CPDONE)) { ! 140: asm("mtpr r11,$0x1c"); /* mtpr r11,$PDCS */ ! 141: } ! 142: if (!(cpout.cp_hdr.cp_unit & CPDONE)) cp_hlt(); /* Time out */ ! 143: if (c== '\n') putchar('\r'); ! 144: } ! 145: ! 146: cp_hlt() ! 147: { ! 148: asm("movl $0xeeeeeeee,r0"); ! 149: asm("movl $0xeeeeeeee,r1"); ! 150: asm("movl $0xeeeeeeee,r2"); ! 151: asm("halt"); ! 152: } ! 153:
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